CN101214175B - Knee joint endoprosthesis - Google Patents
Knee joint endoprosthesis Download PDFInfo
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- CN101214175B CN101214175B CN2008100452056A CN200810045205A CN101214175B CN 101214175 B CN101214175 B CN 101214175B CN 2008100452056 A CN2008100452056 A CN 2008100452056A CN 200810045205 A CN200810045205 A CN 200810045205A CN 101214175 B CN101214175 B CN 101214175B
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- condyle
- tibia
- knee
- tibial
- femoral prosthesis
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Abstract
The present invention provides an internal knee joint prosthesis which comprises a femoral prosthesis (1) which is connected with the far end of the femoral, a tibial gasket (4) which is fixed at a tibial support (5), the tibial support which is connected with the close end of a tibia, a tibial intercondylar eminence (3) filled into the intercondylar hole (4c) of the tibial gasket (4) and the protrudent platform (5f) hole of the tibial support (5) and a bolt (2) which ensures the opposite position of the tibial intercondylar eminence (3) with the tibial gasket (4) and the tibial support (5). The inner condylar (4a) and outer condylar (4b) joint faces of the tibial gasket (4) are respectively opposite to the inner condylar (1a) and outer condylar (1b) joint faces of the femoral prosthesis (1), so as to ensure that the femoral prosthesis (1) can realize the actions of extending, bending and backwards rolling at the tibial gasket (4). The tibial intercondylar eminence (3) is extended into the condylar interval area (1d) of the femoral prosthesis, so as to ensure the knee extension stability of the knee joint. The part of the tibial intercondylar eminence (3) near the outer condyle (1b) of the femoral prosthesis (1) is excised to ensure that the femoral prosthesis (1) has larger outwards rotation angle at the bending knee position, so as to realize the deep bend of the knee joint.
Description
Technical field
The present invention relates to a kind of medical artificial joint, relate in particular to a kind of knee-joint endoprosthesis that is applied to human body, in knee arthroplasty, be used for replacing the human body natural's knee joint that causes all or part of afunction owing to reasons such as pathological changes or damages.
Background technology
The history of the development of artificial knee joint surplus the present existing 40 year when human body natural's knee joint causes all or part of afunction owing to reasons such as pathological changes or damages, just need be replaced with artificial knee joint, with the reconstruction knee joint, alleviates patient's slight illness.
Usually said knee-joint endoprosthesis comprises femoral prosthesis and tibial prosthesis two large divisions.Wherein, femoral prosthesis by femur stem is installed or screw is connected with distal femur, has internal skeleton condyle and dermoskeleton condyle.Tibial prosthesis is divided into tibia liner and tibial bearing two parts, tibial bearing is fixed on proximal tibia, the tibia liner is between femoral prosthesis and tibial bearing, be fixed on the tibial bearing, in it dermoskeleton facies artieularis malleolaris respectively with femoral prosthesis in the dermoskeleton facies artieularis malleolaris be complementary, to simulate normal human body natural's motion of knee joint process.
For human body natural's knee joint, when knee joint when being in knee-expanding position, ridge stretches in the femoral intercondylar groove between the tibia condyle, with ligament and soft tissue have been realized kneed stability jointly on every side, when knee joint when knee-expanding position begins to go down on one's knees gradually, the outward turning angle of the relative tibia of femur increases gradually.So in knee-joint endoprosthesis, ridge is to realize kneed knee-expanding position stability between design tibia condyle, simultaneously, ridge can increase the outward turning angle of the relative tibial prosthesis of femoral prosthesis between the tibia condyle, to increase kneed angle of bend.In U.S. Pat 6793680, proposed a kind of new of ridge between the tibia condyle, ridge protrudes in the knee joint front part between its tibia condyle, to realize kneed knee-expanding position stability, recessed at rear section, the outward turning angle of the relative tibial prosthesis of femoral prosthesis when going down on one's knees with increase.In U.S. Pat 7066963, among the US6902582, the ridge front part is higher than rear section between the tibia condyle, realizes kneed knee-expanding position stability on the one hand, increases the outward turning angle of the relative tibial prosthesis of femoral prosthesis when going down on one's knees on the other hand.But ridge and tibia liner all are an integral body between the tibia condyle in these patents, and when the wearing and tearing of ridge between the tibia condyle increased, the life-span of whole tibia liner will reduce, thereby influences the kinetic stability of knee-joint endoprosthesis.
Summary of the invention
Deficiency at above technology and patent, the present invention proposes a kind of new human body knee joint endoprosthesis, and purpose is: at first, when knee joint when being in knee-expanding position, ridge stretches in the femoral intercondylar groove between the tibia condyle, with the kneed stability of the common realization of ligament and soft tissue on every side.Secondly, ridge can increase the outward turning angle of the relative tibial prosthesis of femoral prosthesis between the tibia condyle, increasing kneed angle of bend, and realizes the knee joint deep flexion.At last, ridge and tibia liner separate design between the tibia condyle, ridge adopts wear-resistant metal material to make between the tibia condyle, with the anti-wear performance of ridge between raising tibial prosthesis condyle, and then the kinetic stability of assurance knee-joint endoprosthesis.
Knee-joint endoprosthesis described in the present invention is applicable to knee joint peripheral ligament and the intact patient of soft tissue function.
The concrete formation of this device:
Femoral prosthesis 1, this prosthese is connected with distal femur, has internal skeleton condyle 1a, dermoskeleton condyle 1b and intercondylar area territory 1d;
Tibial bearing 5, this bearing is connected with proximal tibia;
Tibia liner 4, this liner is fixed on the tibial bearing 5, has internal skeleton condyle 4a and dermoskeleton condyle 4b;
Screw 2 links to each other with the boss 5f of hole 4c and tibial bearing 5 between the condyle of tibia liner 4.
The technical scheme that this device is implemented:
When knee joint by enuflex position during gradually to knee-expanding position, ridge 3 stretches in the intercondylar area territory 1d of femoral prosthesis gradually between the tibia condyle, its top peripheral face 3a, 3b, 3c, 3d match with femoral prosthesis intercondylar area territory 1d, to guarantee the kneed knee joint stability of stretching.
When kneed angle of bend increases gradually, the outward turning angle of femoral prosthesis 1 increases gradually, it is cut that ridge 3 is close to the part of femoral prosthesis 1 dermoskeleton condyle 1b between the tibia condyle, be ridge 3 between the tibia condyle the top peripheral face one of them be inclined-plane 3e, and has counterclockwise included angle B between this top peripheral face 3e and the vertical curve T, at this moment, the rear section 1c of femoral prosthesis 1 dermoskeleton condyle 1b not can and the tibia condyle between ridge 3 interfere, thereby guarantee that femoral prosthesis 1 has bigger outward turning angle when enuflex position, increasing kneed angle of bend, and finally realize the knee joint deep flexion.
Advantage of the present invention is: at first, can realize the kneed knee joint stability of stretching.Secondly, the outward turning angle of the relative tibial prosthesis of femoral prosthesis increases, and can increase kneed angle of bend and realize the knee joint deep flexion.At last, ridge adopts wear-resistant metal material to make between the tibia condyle, and this not only can improve the bulk life time of knee-joint endoprosthesis, and can guarantee the kinetic stability of knee-joint endoprosthesis.
Fig. 1 knee-joint endoprosthesis decomposition diagram
Fig. 2 tibial prosthesis front view
Fig. 3 is about the cutaway view of Fig. 2 section line K-K
Fig. 4 is about the cutaway view of Fig. 2 section line H-H
Fig. 5 is about the symmetrical instance graph of ridge between the tibia condyle
Sequence number among the figure, 1. femoral prosthesis, 2. screw, 3. ridge between the tibia condyle, 4. tibia liner, 5. tibial bearing A. knee joint front side, P. knee joint rear side, M. knee joint inboard, the L. knee joint outside
The specific embodiment:
In Fig. 1, Fig. 2, Fig. 3 and Fig. 4, femoral prosthesis 1 is made by cobalt-chromium-molybdenum alloy material, is connected with distal femur by femur installation stem or screw, has internal skeleton condyle 1a and dermoskeleton condyle 1b.Tibial bearing 5 is made by cobalt-chromium-molybdenum alloy material, by tibia stem 5c is installed and is connected with proximal tibia with fixed leg 5b, 5d, wherein, tibia is installed stem 5c and is pressed into the tibia pulp cavity, play main fixation, fixed leg 5b, 5d are pressed into the proximal tibia osteotomy surface, play anti-rotation and auxiliary fixation.Tibia liner 4 is made by superhigh molecular weight polyethylene material, between femoral prosthesis 1 and tibial bearing 5, have internal skeleton condyle 4a and dermoskeleton condyle 4b, realize the location of tibia liner 4 by protruding 5a and 5e along M-L direction (interior-outer direction) along tibial bearing A-P direction (preceding-rear to), by tibia liner 4 upper edge A-P directions (preceding-rear to) bayonet socket face 4c, 4d and tibial bearing 5 are along A-P direction (preceding-rear to) bayonet socket face 5h, the cooperation of 5j realizes that tibia liner 4 is along the location of A-P direction (preceding-rear to) and fixing, simultaneously, can prevent tibia liner 4 upward dislocations.Ridge 3 is made by wear-resistant metal material between the tibia condyle, packs between tibia liner 4 condyles in the 4c of hole and in the tibial bearing 5 boss 5f holes.The 2b of screw 2 partly stretches into the respective aperture of ridge 3 between the tibia condyle, ridge 3 and tibia liner 4 are located with the relative position of tibial bearing 5 between the realization condyle, the 2a of screw 2 partly is an external screw thread, be connected with the respective screw hole of tibia liner 4, ridge 3 and tibia liner 4 are fixed with the relative position of tibial bearing 5 between the realization condyle.
In Fig. 1, when knee joint by enuflex position gradually to knee-expanding position, or by knee-expanding position during gradually to enuflex position, the internal skeleton condyle 1a articular surface of femoral prosthesis 1 and dermoskeleton condyle 1b articular surface are complementary with the internal skeleton condyle 4a articular surface and the dermoskeleton condyle 4b articular surface of tibia liner 4 respectively, realizing the bending of femoral prosthesis 1 on tibia liner 4, slide and to roll action such as back, thereby simulate normal human body natural's motion of knee joint process.
In Fig. 1 and Fig. 2, when knee joint by enuflex position during gradually to knee-expanding position, ridge 3 stretches in the intercondylar area territory 1d of femoral prosthesis gradually between the tibia condyle, and its top peripheral face 3a, 3b, 3c, 3d match with femoral prosthesis intercondylar area territory 1d, to guarantee the kneed knee joint stability of stretching.
In Fig. 1 and Fig. 2, when knee joint is gone down on one's knees gradually by knee-expanding position, and when increasing gradually along with angle of bend, femoral prosthesis 1 carries out outward turning along the relative tibia liner 4 of the direction of R shown in Fig. 2, and the outward turning angle increases gradually, it is cut that ridge 3 is close to the part of femoral prosthesis 1 dermoskeleton condyle 1b between the tibia condyle, be ridge 3 between the tibia condyle the top peripheral face one of them be inclined-plane 3e, and has counterclockwise included angle B between this top peripheral face 3e and the vertical curve T, at this moment, the rear section 1c of femoral prosthesis 1 dermoskeleton condyle 1b not can and the tibia condyle between ridge 3 interfere, thereby guarantee that femoral prosthesis 1 has bigger outward turning angle when enuflex position, increasing kneed angle of bend, and finally realize the knee joint deep flexion.The size of included angle B can be selected, thereby can insert ridge 3 between only tibia condyle according to patient's practical situation.
Knee-joint endoprosthesis is applicable to the right side knee joint shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4.
In Fig. 2, ridge 3 between the tibia condyle is changed to ridge symmetry example 3 ' between tibia condyle shown in Figure 5, knee-joint endoprosthesis as herein described is equally also applicable to the left side knee joint.
Claims (3)
1. knee-joint endoprosthesis is characterized in that:
Femoral prosthesis (1), this prosthese is connected with distal femur, has internal skeleton condyle (1a), dermoskeleton condyle (1b) and intercondylar area territory (1d);
Tibial bearing (5), this bearing is connected with proximal tibia;
Tibia liner (4), this liner are fixed on the tibial bearing (5), have internal skeleton condyle (4a) and dermoskeleton condyle (4b);
Ridge between the tibia condyle (3), in the hole (4c) of packing between tibia liner (4) condyle and in tibial bearing (5) boss (5f) hole, top peripheral is made up of top peripheral face (3a, 3b, 3c, 3d, 3e), and one of them is inclined-plane (3e) for the top peripheral face;
Screw (2) links to each other with the boss (5f) of hole (4c) and tibial bearing (5) between the condyle of tibia liner (4).
2. knee-joint endoprosthesis according to claim 1, it is characterized in that, when knee-expanding position, ridge between the tibia condyle (3) stretches in the intercondylar area territory (1d) of femoral prosthesis, its top peripheral face (3a, 3b, 3c, 3d) matches with femoral prosthesis intercondylar area territory (1d), to guarantee the kneed knee joint stability of stretching.
3. knee-joint endoprosthesis according to claim 1, it is characterized in that, it is cut that ridge between the tibia condyle (3) is close to the part of femoral prosthesis (1) dermoskeleton condyle (1b), be ridge between the tibia condyle (3) the top peripheral face one of them be inclined-plane (3e), and has counterclockwise angle (B) between this top peripheral face (3e) and the vertical curve (T), to guarantee that femoral prosthesis (1) has bigger outward turning angle when the enuflex position, thereby increase kneed angle of bend, and finally realize the knee joint deep flexion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100452056A CN101214175B (en) | 2008-01-17 | 2008-01-17 | Knee joint endoprosthesis |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100452056A CN101214175B (en) | 2008-01-17 | 2008-01-17 | Knee joint endoprosthesis |
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| Publication Number | Publication Date |
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| CN101214175A CN101214175A (en) | 2008-07-09 |
| CN101214175B true CN101214175B (en) | 2011-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100452056A Expired - Fee Related CN101214175B (en) | 2008-01-17 | 2008-01-17 | Knee joint endoprosthesis |
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Families Citing this family (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8075626B2 (en) * | 2008-06-30 | 2011-12-13 | Depuy Products, Inc. | Orthopaedic knee prosthesis having increased axial-rotation |
| WO2010096960A1 (en) * | 2009-02-25 | 2010-09-02 | 北京纳通投资有限公司 | Artificial knee replacement prostheses with anterior cruciate ligament reserved or reconstructed |
| CN103118635B (en) | 2010-07-24 | 2015-11-25 | 捷迈有限公司 | For the asymmetric tibial component of knee prosthesis |
| US8764840B2 (en) | 2010-07-24 | 2014-07-01 | Zimmer, Inc. | Tibial prosthesis |
| US8591594B2 (en) | 2010-09-10 | 2013-11-26 | Zimmer, Inc. | Motion facilitating tibial components for a knee prosthesis |
| US8603101B2 (en) | 2010-12-17 | 2013-12-10 | Zimmer, Inc. | Provisional tibial prosthesis system |
| US20130006378A1 (en) * | 2011-06-30 | 2013-01-03 | Wogoman Thomas E | Polymer femoral trial component |
| CN202313810U (en) * | 2011-11-07 | 2012-07-11 | 黄国富 | Buffering surface type knee joint |
| US8764838B2 (en) | 2011-11-18 | 2014-07-01 | Zimmer, Inc. | Tibial bearing component for a knee prosthesis with improved articular characteristics |
| EP2782525B1 (en) | 2011-11-21 | 2016-07-20 | Zimmer, Inc. | Tibial baseplate with asymmetric placement of fixation structures |
| WO2013115849A1 (en) | 2012-01-30 | 2013-08-08 | Zimmer, Inc. | Asymmetric tibial components for a knee prosthesis |
| CN102614036B (en) * | 2012-04-24 | 2014-10-29 | 北京纳通科技集团有限公司 | Knee joint prosthesis pad, shinbone base element and knee joint prosthesis |
| US9925052B2 (en) | 2013-08-30 | 2018-03-27 | Zimmer, Inc. | Method for optimizing implant designs |
| CN103654925A (en) * | 2013-12-17 | 2014-03-26 | 李健 | Implanted-type joint limiting device |
| CN104586544A (en) * | 2015-01-15 | 2015-05-06 | 北京爱康宜诚医疗器材股份有限公司 | High-flexion type knee joint prosthesis |
| EP3352708B1 (en) | 2015-09-21 | 2020-07-22 | Zimmer, Inc. | Prosthesis system including tibial bearing component |
| EP3592299B1 (en) | 2017-03-10 | 2021-06-09 | Zimmer, Inc. | Tibial prosthesis with tibial bearing component securing feature |
| CA3063415C (en) | 2017-05-12 | 2021-10-19 | Zimmer, Inc. | Femoral prostheses with upsizing and downsizing capabilities |
| CN107149512A (en) * | 2017-06-28 | 2017-09-12 | 江苏奥康尼医疗科技发展有限公司 | A kind of knee joint tibial part |
| CN107693166B (en) * | 2017-09-30 | 2024-01-12 | 北京安颂科技有限公司 | Femoral condyle prosthesis and artificial knee joint |
| CN107693167B (en) * | 2017-11-02 | 2024-01-16 | 北京安颂科技有限公司 | Tibial insert prosthesis, tibial prosthesis and artificial knee joint |
| US11426282B2 (en) | 2017-11-16 | 2022-08-30 | Zimmer, Inc. | Implants for adding joint inclination to a knee arthroplasty |
| US10835380B2 (en) | 2018-04-30 | 2020-11-17 | Zimmer, Inc. | Posterior stabilized prosthesis system |
| CN109620478A (en) * | 2019-02-02 | 2019-04-16 | 优适医疗科技（苏州）有限公司 | Knee joint single condyle component and the single condyle articular system for applying it |
| EP4112010A4 (en) * | 2020-02-28 | 2023-04-12 | Beijing AK Medical Co., Ltd. | Knee prosthesis |
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2008
- 2008-01-17 CN CN2008100452056A patent/CN101214175B/en not_active Expired - Fee Related
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| CN101214175A (en) | 2008-07-09 |
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Granted publication date: 20110323 Termination date: 20120117 |